Can someone pls explain how to solve the equation using two different first steps

Mathematics

1 answer:

tamaranim1 [39]2 years ago

6 0

Answer:

1. 7*3 - 7*x = -63

2. 3-x = -63/7

Step-by-step explanation:

1. 7(3-x) = -63

7*3 - 7*x = -63

2. 3-x = -63/7

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Simplify 4 over 7 divided by 3 over negative 8

Stolb23 [73]

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Step-by-step explanation:

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6 0

3 years ago

If 10 + a = 10, then a = 0

Lunna [17]

Answer:

B) identity property of addition.

Step-by-step explanation:

Given:

The statement given is:

$10+a=10,\ then\ a=0$

Here, we observe that 10 is added to a giving the number 10 itself as the answer. So, we know of a property which says that when 0 is added to a number, the result is the number itself. This property is called identity property of addition.

So, the value of $a$ must be 0 because on adding $a$ to 10, we are getting the number 10 only. So, the above statement is an example of identity property of addition.